Why cant I change the details I want to change?

Someone else set up this blog for me. The URL has a mispelling in it however... FAIL. It should be theanomalysrapture not theanomalisrapture. Can this be corrected? Also why wont my display name change be saved? These things are frustrating. I hope you can help.
Blog url: http://theanomalisrapture.wordpress.com/

I am not opposed to the URL ending with.wordpress.com as much as the typographical error in the domain. The browser I use is Chrome ver. 13.0.782.220 m recently updated (5 Days or so) I will try the steps listed above but do you have any suggestion as to why my user tag change wont be stored?